M21208/M21218
SD and HD/SD-SDI Digital Video Cable Drivers
Rev V4
Applications
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Serial Routing Switchers, Production/Master Control Switchers
Distribution Amplifiers
Video Tape Recorders, ENG Edit decks, Cameras
Broadcast video applications
NLE's, MPEG Encoders/Decoders, format convertors etc.
Standards Compliance
• SMPTE 292M, 259M, 344M
HD and SD operation (M21218)
SD operation (M21208)
Pin compatible to GS9068/9068A (M21208)
Pin compatible to GS1528/1528A (M21218)
800 mVp–p single ended output swing (typical)
1600 mVp–p maximum single ended output swing
SD/HD Slew Rate control (M21218)
2.5V or 3.3V supply
Low PDISS (122 mW @ 2.5V, 144 mW @ 3.3V)
Extended temperature range: -10 °C to 85 °C
RoHS package
The M21208 and M21218 are high-speed, low-power, low-jitter cable drivers. They are designed to drive serial
digital video data through 75Ω coaxial cable typically used in SMPTE and DVB-ASI video applications. The
M21218 cable driver is optimized for performance from 143 Mbps up to 1485 Mbps, it has selectable slew rate for
SD-SDI and HD-SDI applications. The M21208 cable driver is optimized for performance from 143 Mbps up to 540
Mbps with SD-SDI slew rates.
The typical output rise/fall time of the M21218 is 100 ps for HD rates. Both devices have a typical set slew rate of
600 ps at SD rates. The default output voltage swing is compliant with SMPTE 292M, 259M and 344M using a
750Ω ±1% resistor. The M21208 and M21218 are pin compatible, with the exception that the M21208 has no SD/
HD control pin. M21208/M21218 support a maximum single ended output swing of 1600 mVp–p, when configured
appropriately.
Both devices are available in a small outline RoHS compliant package, which is backwards compatible with
standard JEDEC SnPb processes. The M21208 is pin compatible with the GS9068/9068A devices, and the
M21218 is pin compatible with the GS1528/1528A, both support 2.5V and 3.3V operation.
Functional Block Diagram
2.5V - 3.3V and
BIAS CIRCUITRY
AVDD
SDI
INPUT
BUFFER
SDI
OUTPUT
BUFFER
SD/HD*
SDO
SDO
M21208 /M21218
CABLE DRIVER
RSET
* SD/HD on M21218 only
1
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
http://www.macom.com/support
M21208/M21218
SD and HD/SD-SDI Digital Video Cable Drivers
Rev V4
Ordering Information
Part Number
Data Rates Supported
Package
Operating Temperature
M21208G-xx*
143–540 Mbps
SOIC—8 pin
-10 °C to 85 °C
M21218G-xx*
143–1485 Mbps
SOIC—8 pin
-10 °C to 85 °C
* Consult the MACOM price list for exact part number when ordering.
* The letter “G” designator after the part number indicates that the device is RoHS-compliant. This device is backward compatible with existing 225 °C reflow
profiles.
Revision History
Revision
Level
Date
Description
V4
Release
May 2015
Updated logos and page layout. No content changes.
C (V3)
Release
July 2009
Revised AVDD maximum rating in Table 1-1.
Revised 2.5V to 3.3V minimum termination voltage.
B (V2)
Release
April 2007
Updated ordering information.
Modified text in Section 2.2.2 to indicate that RSET must be used.
SD/HD changed to pull-up in Table 2-2.
DCD figure changed in Table 1-6 and Table 1-7.
A (V1)
Release
February 2007
Production Release.
Combined M21208 and M21218 data sheets (21208-DSH-001-A and 21218-DSH-002-A).
Changed maximum output swing to 1600 mV.
Removed 1.8V operation.
Updated Tables 2-1, 1-2, 1-3, and 1-7.
2
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
http://www.macom.com/support
M21208/M21218
SD and HD/SD-SDI Digital Video Cable Drivers
Rev V4
Table of Contents
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.0
Product Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
1.2
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
1.3
DC Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
1.4
Input/Output Level Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
1.5
Package Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
1.5.1
2.0
Mechanical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.5.1.1
Package Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1
General Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
2.2
Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
2.3
2.2.1
HD-SDI and SD-SDI Slew-rate Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.2.2
Output Amplitude Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Pin Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
2.3.1
2.3.2
2.3.3
High-speed Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
High-speed Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
M21208/M21218 Pin List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
A.1
A.2
Glossary of Terms/Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Reference Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
A.2.1
External . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
http://www.macom.com/support
M21208/M21218
SD and HD/SD-SDI Digital Video Cable Drivers
Rev V4
List of Figures
Figure 1-1.
Output Symbols Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 1-2.
Package Drawing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 2-1.
Typical Input Circuit—AC Coupled. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 2-2.
Typical Input Circuit—DC Coupled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 2-3.
Typical Output Matching/Back-termination circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 2-4.
M21208 Pin Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 2-5.
M21218 Pin Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
http://www.macom.com/support
M21208/M21218
SD and HD/SD-SDI Digital Video Cable Drivers
Rev V4
List of Tables
Table 1-1.
Absolute Maximum Ratings (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 1-2.
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 1-3.
Power DC Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 1-4.
CMOS Input Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 1-5.
High-Speed Input Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 1-6.
Cable Driver Output Electrical Specifications M21208 (SD only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 1-7.
Cable Driver Output Electrical Specifications M21218 (SD/HD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 2-1.
Output Swing vs. Supply and Termination Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 2-2.
Interface Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 2-3.
Power Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 2-4.
High-speed Signal Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table A-1.
Glossary and Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
http://www.macom.com/support
M21208/M21218
SD and HD/SD-SDI Digital Video Cable Drivers
Rev V4
1.0 Product Specification
1.1
Absolute Maximum Ratings
Table 1-1.
Absolute Maximum Ratings (1)
Symbol
Parameter
Minimum
Maximum
Units
AVDD
I/O Power
AVSS - 0.5
3.6
V
VIOAM
Voltage on any I/O Pin
AVSS - 0.5
AVDD + 0.5
V
TSTORE
Storage Temperature
-65
+150
°C
ESDHBML
Human Body Model (low-speed)
2000
—
V
ESDHBMH
Human Body Model (high-speed)
2000
—
V
ESDCDM
Charge Device Model
500
—
V
NOTE:
1.
Absolute Maximum is the limit beyond which the device life cannot be guaranteed. These limits shall not be construed to imply operational limits. Please
refer to recommended operating conditions when evaluation device performance and functionality.
1.2
Recommended Operating Conditions
Table 1-2.
Recommended Operating Conditions
Symbol
Parameter
Notes
Minimum
Typical
Maximum
Units
AVDD
Device Power
1
—
2.5/3.3
—
V
AVSS
Device Ground
—
—
0
—
V
TA
Ambient Temperature
—
-10
—
+85
°C
θJA
Junction to ambient Thermal Resistance
—
—
110
—
°C/W
75Ω Output Termination Voltage
—
AVDDTERM
See Table 2-1
NOTE:
1.
±5% is allowed from nominal supply.
6
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V
M21208/M21218
SD and HD/SD-SDI Digital Video Cable Drivers
1.3
Rev V4
DC Electrical Specifications
Table 1-3.
Power DC Electrical Specifications
Symbol
IDD
Parameter
Supply Current
Notes
Minimum
Typical
Maximum
Units
1, 2
—
27
—
mA
IDDTERM
Current in external termination resistors
1, 2, 3
—
22
—
mA
PDISSINT
Power dissipation (AVDD = 2.5V, AVDDTERM = 3.3V)
1, 2, 5
—
122
—
mW
PDISSINT
Power dissipation (AVDD = 2.5V, AVDDTERM = 5.0V)
1, 2, 5
—
159
—
mW
PDISSINT
Power dissipation (AVDD = 3.3V, AVDDTERM = 3.3V)
1, 2, 5
—
144
—
mW
PDISSINT
Power dissipation (AVDD = 3.3V, AVDDTERM = 5.0V)
1, 2, 5
—
181
—
mW
PDISSTOT
Power dissipation (AVDD = 2.5V, AVDDTERM = 3.3V)
1, 2, 4
—
140
—
mW
PDISSTOT
Power dissipation (AVDD = 2.5V, AVDDTERM = 5.0V)
1, 2, 4
—
177
—
mW
PDISSTOT
Power dissipation (AVDD = 3.3V, AVDDTERM = 3.3V)
1, 2, 4
—
162
—
mW
PDISSTOT
Power dissipation (AVDD = 3.3V, AVDDTERM = 5.0V)
1, 2, 4
—
199
—
mW
NOTES:
1.
Recommended operating conditions—see Table 1-2.
2.
800 mV standard SMPTE swing, terminated as in Figure 1-3.
3.
A portion of the power will be dissipated in the external 75OΩ termination (PEXT = VOD x ITERM).
4.
PDISSTOT = AVDD x IDD + AVDDTERM x ITERM.
5.
PDISSINT = PDISSTOT - PEXT.
1.4
Input/Output Level Specifications
Table 1-4.
CMOS Input Electrical Specifications
Symbol
Parameter
Notes
Minimum
Typical
Maximum
Units
VIH
Input Logic High Voltage
1
0.75 x AVDD
—
AVDD + 0.3
V
VIL
Input Logic Low Voltage
1
0
—
0.25 x AVDD
V
IIH
Input Current (logic High)
1
-100
—
100
μA
IIL
Input Current (logic Low)
1
-100
—
100
μA
NOTES:
1.
Specified at recommended operating condition—see Table 1-2.
7
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
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M21208/M21218
SD and HD/SD-SDI Digital Video Cable Drivers
Table 1-5.
Rev V4
High-Speed Input Electrical Specifications
Symbol
Parameter
Notes
Minimum
Typical
Maximum
Unit
DRIN
Input Bit Rate (M21208)
1, 3
0
—
540
Mbps
DRIN
Input Bit Rate (M21218)
1, 3
0
—
1485
Mbps
1, 4, 5
100
—
2000
mV
VID
Input Differential Voltage (peak to peak)
VCM
Input Common-Mode Voltage
1, 2
1200
AVDD
—
mV
VIH
Maximum Input High Voltage
1
—
—
AVDD + 400
mV
VIL
Minimum Input Low Voltage
1
1200
—
—
mV
RIN
Single-ended input impedance
1
—
13.33
20
kΩ
NOTES:
1.
Specified at recommended operation conditions—see Table 1-2.
2.
Part is DC coupled from input to output.
3.
Example 1200 mVpp differential = 600 mVpp for each single-ended terminal.
4.
Minimum input level defined as error free operation at 1 x 10-12 BER.
8
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M21208/M21218
SD and HD/SD-SDI Digital Video Cable Drivers
Table 1-6.
Cable Driver Output Electrical Specifications M21208 (SD only)
Symbol
DROUT
tr/tf
tr/tfMM
Rev V4
Parameter
Notes
Minimum
Typical
Maximum
Unit
Output Bit Rates
1, 5
—
—
540
Mbps
SD Rise/Fall Time (20–80%)
1, 3
400
600
800
ps
Rise/fall mismatch
1, 2
—
40
100
ps
VOD
Single-ended voltage swing range (sw) p–p
1, 2, 4, 5
500
800
1600
mV
VODTOL
Swing Level output variation at 800 mVp–p
1, 2, 3
-7
—
+7
%
Overshoot/Undershoot
1, 2
-8
—
+8
%
JAOPP
Additive Output Jitter
1, 8
—
40
60
ps
DCD
Duty Cycle Distortion
1, 2, 6, 8
—
20
70
ps
S22
Output Return Loss (5 MHz to 600MHz)
1, 2, 7
15
—
—
dB
[RSET = 750Ω ±1%] (Single-Ended)
VOS
NOTES:
Entire table tested with a 400 mVp–p differential input.
1. Specified at recommended operating condition—see Table 1-2.
2.
Specification verified at 800 mVpp output with 1m cable.
3.
Rated at nominal SMPTE 800 mV output swing level (using a 750Ω ±1% resistor at RSET).
4.
Output stage is an open collector differential pair, actual swing dependant on IC supply voltage and external termination voltage.
5.
Into 75Ω back termination and 75Ω load and appropriate external termination voltage.
6.
Duty Cycle Distortion (DCD) is defined as the difference in the intrinsic jitter at the 50% voltage level and the intrinsic jitter at the rising/falling edge crossing
point. If the rising/falling edge crossing point is at the 50% voltage level, then DCD = 0.
7.
Measured under DC conditions that simulate AC coupling, VT = 3.3V.
8.
Measured using a “1010” data pattern.
Table 1-7.
Cable Driver Output Electrical Specifications M21218 (SD/HD) (1 of 2)
Symbol
DROUT
tr/tf
tr/tfMM
Parameter
Notes
Minimum
Typical
Maximum
Unit
1
—
—
1485
Mbps
SD Rise/Fall Time (20–80%)
1, 3
400
600
800
ps
HD Rise/Fall Time (20–80%)
1, 3
—
100
180
ps
Rise/fall mismatch (HD Rate)
1, 2
—
10
30
ps
Rise/fall mismatch (SD Rate)
1, 2
—
40
100
ps
Output Bit Rates
VOD
Single-ended voltage swing range (sw) p–p
1, 2, 4, 5
500
800
1600
mV
VODTOL
Swing Level output variation at 800 mVp–p
1, 2, 3
-7
—
+7
%
Overshoot/Undershoot
1, 2
-8
—
+8
%
Additive Output Jitter (HD rate 1010 pattern)
1, 8
—
20
30
ps
Additive Output Jitter (SD rate 1010 pattern)
1, 8
—
40
60
ps
[RSET = 750Ω ±1%] (Single-Ended)
VOS
JAOPP
9
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M21208/M21218
SD and HD/SD-SDI Digital Video Cable Drivers
Table 1-7.
Symbol
DCDO
S22
Rev V4
Cable Driver Output Electrical Specifications M21218 (SD/HD) (2 of 2)
Parameter
Notes
Minimum
Typical
Maximum
Unit
Duty Cycle Distortion (HD Rate)
1, 2, 6, 8
—
15
30
ps
Duty Cycle Distortion (SD Rate)
1, 2, 6, 8
—
20
70
ps
1, 2, 7
15
—
—
dB
Output Return Loss (5 MHz to 1.5 GHz)
NOTES:
1.
Entire table specified at recommended operating condition with 400 mVp–p differential input—see Table 1-2.
2.
Specification verified at 800 mVpp output with 1m cable on MACOM test board. System results may vary.
3.
Rated at nominal SMPTE 800 mV output swing level (using a 750Ω ±1% resistor at RSET).
4.
Output stage is an open collector differential pair, actual swing dependant on IC supply voltage and external termination voltage.
5.
Into 75Ω back termination and 75Ω load and appropriate external termination voltage.
6.
Duty Cycle Distortion (DCD) is defined as the difference in the intrinsic jitter at the 50% voltage level and the intrinsic jitter at the rising/falling edge crossing
point. If the rising/falling edge crossing point is at the 50% voltage level, then DCD = 0.
7.
Measured under DC conditions that simulate AC coupling, VT = 3.3V.
8.
Measured using a “1010” data pattern.
10
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M21208/M21218
SD and HD/SD-SDI Digital Video Cable Drivers
Figure 1-1.
Rev V4
Output Symbols Definition
tr
tf
VOH
JOPP
VOD VOCM
VOL
VOH: Average voltage high level
VOL: Average voltage low level
VOD: (VOH) – (VOL)
VOCM: Common Mode Voltage
JOPP: Output Jitter Peak-Peak
tr: 20-80% Rise Time
tf: 80-20% Fall Time
NOTE: Waveform above is differential.
11
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M21208/M21218
SD and HD/SD-SDI Digital Video Cable Drivers
1.5
Package Specification
1.5.1
Mechanical Description
1.5.1.1
Package Information
Rev V4
The M21218 is available in a 8 pin, RoHS compliant, SOIC package. The package drawing is shown in Figure 1-2.
Figure 1-2.
Package Drawing
12
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M21208/M21218
SD and HD/SD-SDI Digital Video Cable Drivers
Rev V4
2.0 Functional Description
2.1
General Nomenclature
Through out this data sheet, physical pins will be denoted in BOLD print.
2.2
Features
2.2.1
HD-SDI and SD-SDI Slew-rate Selection
The output slew rate of the M21218 is selectable to conform with the different SD-SDI and HD-SDI specifications.
With SD/HD = Low, the high-definition (1485 Mbps) slew rate is typically 100 ps. The slew rate will vary depending
on the output matching network and BNC connector used.
With SD/HD = High, for standard definition (143 to 540 Mbps) applications, the slew rate is typically 600 ps, which
is compliant with SMPTE 259M and SMPTE 344M. The M21208 has no control over slew rate; this is set at the SD
requirement.
2.2.2
Output Amplitude Adjustment
For SMPTE compliance, an external 750Ω ±1% resistor at RSET to AVDD is recommended for a swing level of 800
mV within a tolerance that is less than ±7%. The output amplitude can also be adjusted to range from 500 to 1600
mV using the following formula:
Output Swing = (600 / RSET) mVp–p
[RSET in kΩ] (in mVpp, single-ended)
The actual swing is set as a function of the IC supply voltage and external termination voltage as shown in
Table 2-1. For a 3.3V minimum termination voltage, the IC can be SMPTE compliant for all supply voltages. In
applications where a lossy matching or splitting networks are used, the M21208/M21218 offers additional gain for
up to 1600 mV output swings, so the output after the lossy network can be SMPTE compliant. For single-supply
3.3V operation, the swing range is compatible with the GS9068/GS9068A and GS1528/1528A.
Table 2-1.
Output Swing vs. Supply and Termination Voltage
AVDD (V)
AVDDTERM (V)*
Maximum Swing
(Single-ended mVp–p)
Minimum Swing
(Single-ended mVp–p)
2.5–3.3V
3.3V
1200 mV
500 mV
2.5–3.3V
5.0V
1600 mV
500 mV
* ±5% tolerance allowed for AVDDTERM.
13
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M21208/M21218
SD and HD/SD-SDI Digital Video Cable Drivers
2.3
Pin Definitions
2.3.1
High-speed Inputs
Rev V4
The M21208/M21218 are designed to be operated with input signals as low as 100 mV or up to 2000 mV
differential peak to peak. The M21218 requires external termination resistors to minimize high-speed reflections.
The M21208 and M21218 are designed as pin compatible replacements to the GS9068/9068A and GS1528/1528A
cable drivers, respectively, and the recommended input circuits are shown in Figure 2-1 and 2-2.
Figure 2-1.
Typical Input Circuit—AC Coupled
4.7 μF
DDI
DDO
Tx Device
M21208
M21218
100 Ω
DDI
DDO
4.7 μF
Figure 2-2.
Typical Input Circuit—DC Coupled
PCML Output Stage Connected to
Same AVDD as Cable Driver
DDI
DDO
Tx Device
M21208
M21218
100 Ω
DDO
DDI
14
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M21208/M21218
SD and HD/SD-SDI Digital Video Cable Drivers
2.3.2
Rev V4
High-speed Outputs
The M21208/M21218 output buffer is an open collector buffer that is designed for typical return loss of 15dB using
standard through-hole BNC connectors as typically employed with the GS9068/GS1528 series recommended
back-termination and matching circuit as shown in Figure 2-3. The Output Return Loss (ORL) may be further
optimized by using a different output matching network or component values and may vary with PCB layout or
component selection. The output return loss of the M21208/M21218 is measured while forcing the outputs to a DC
high or low state. Under normal operating conditions, the outputs of the M21208/M21218 will not be held to a static
high or low state, so the measured output return loss will not represent the actual output return loss under normal
operating conditions. To estimate the output return loss performance under typical operating conditions, an
interpolation can be performed on the measured values for the output high condition and output low condition. The
equations used for the interpolation are as follows:
RcH = RmH - (RmH - RmL) / 4 and
RcL = RmL + (RmH - RmL) / 4
RcH = Corrected ORL with output high
RcL = Corrected ORL with output low
RmH = Measured ORL with output stuck high
RmL = Measured ORL with output stuck low
Figure 2-3.
Typical Output Matching/Back-termination circuit
AVDD
4.7 nH
I DD
4.7uF
SDO
BNC
75Ω
M21208
M21218
SDO
75Ω
I TERM
75Ω
AV DDTERM
10nF
BNC
75Ω
4.7uF
4.7 nH
15
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M21208/M21218
SD and HD/SD-SDI Digital Video Cable Drivers
2.3.3
Table 2-2.
M21208/M21218 Pin List
Interface Pins
Pin Name
SD/HD
(M21218 only)
Rev V4
Function
Input control signal to change the output slew rate.
Default
Type
Pull-up
I—CMOS
—
Analog Input
SD/HD = High: Slow output slew rate for SD-SDI rate (143–540 Mbps).
SD/HD = Low: Fast output slew rate for HD-SDI rate (1485 Mbps) [Default].
RSET
Input control signal for setting the single-ended output swing amplitude.
Terminal floating results in 800 mVpp ± 15% swing.
Higher output swing levels or reduced variations with a ±1% tolerance external
resistor.
For 800 mVpp single-ended, a 750Ω ±1% resistor to AVDD is recommended.
NOTE:
Internal pull-down is 100 kΩ.
Table 2-3.
Power Pins
Pin Name
Function
Type
AVSS
Chip Ground
Power
AVDD
Positive Supply
Power
Table 2-4.
High-speed Signal Pins
Pin Name
SDI/SDI
SDO/SDO
Function
Default
Type
Non-inverting and Inverting serial unterminated inputs.
—
I—High-speed
Non-inverting and inverting serial unterminated data outputs to coaxial cable.
—
O—High-speed
16
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M21208/M21218
SD and HD/SD-SDI Digital Video Cable Drivers
Figure 2-4.
M21208 Pin Out
SDI
SDI
AVSS
RSET
Figure 2-5.
Rev V4
M21208
Cable
Driver
SDO
SDO
NC
AVDD
M21218 Pin Out
SDI
SDI
AVSS
RSET
M21218
Cable
Driver
SDO
SDO
SD/HD
AVDD
17
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M21208/M21218
SD and HD/SD-SDI Digital Video Cable Drivers
Rev V4
Appendix
A.1
Table A-1.
Glossary of Terms/Acronyms
Glossary and Acronyms
DTV
Digital Television
DVB
Digital Video Broadcast
EQ
Equalizer or Equalization
HD
High Definition
SD
Standard Definition
SDI
Serial Digital Interface
SMPTE
Society of Motion Picture and Television Engineers
A.2
Reference Documents
A.2.1
External
Society of Motion Picture and Television Engineers
SMPTE 292M Bit—Serial Digital Interface for High-Definition Television Systems
SMPTE 259M 10—Bit 4:2:2 Component and 4fSC Composite Digital Signals—Serial Digital Interface
SMPTE 344M 540Mb/s Serial Digital Interface
DVB Digital Video Broadcast (ASI)
18
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M21208/M21218
SD and HD/SD-SDI Digital Video Cable Drivers
Rev V4
M/A-COM Technology Solutions Inc. All rights reserved.
Information in this document is provided in connection with M/A-COM Technology Solutions Inc ("MACOM")
products. These materials are provided by MACOM as a service to its customers and may be used for
informational purposes only. Except as provided in MACOM's Terms and Conditions of Sale for such products or
in any separate agreement related to this document, MACOM assumes no liability whatsoever. MACOM assumes
no responsibility for errors or omissions in these materials. MACOM may make changes to specifications and
product descriptions at any time, without notice. MACOM makes no commitment to update the information and
shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to its
specifications and product descriptions. No license, express or implied, by estoppel or otherwise, to any
intellectual property rights is granted by this document.
THESE MATERIALS ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR
IMPLIED, RELATING TO SALE AND/OR USE OF MACOM PRODUCTS INCLUDING LIABILITY OR
WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, CONSEQUENTIAL OR INCIDENTAL
DAMAGES, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER
INTELLECTUAL PROPERTY RIGHT. MACOM FURTHER DOES NOT WARRANT THE ACCURACY OR
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MATERIALS. MACOM SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR
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WHICH MAY RESULT FROM THE USE OF THESE MATERIALS.
MACOM products are not intended for use in medical, lifesaving or life sustaining applications. MACOM customers
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MACOM for any damages resulting from such improper use or sale.
19
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